The Influence of Transverse Moduli on Through-Thickness Hygrothermal Expansion Coefficients in Angle-Ply Laminates

Abstract

In this article, the effect of transverse moduli of the lamina on the through-thickness hygrothermal expansion coefficients of the [± 30°]_4s,[± 45°]_4s, and [± 60°]_4s angle-ply laminates is presented. Based on the hygrothermal-elastic lamination theory, a dimensionless analysis has been used to study the influence of the various transverse elastic moduli E₂ and E₃ of a lamina on the through-thickness hygrothermal expansion coefficients in the angle-ply laminates. The results from this dimensionless analysis provide a set of general guidelines for designing and evaluating the values of through-thickness hygrothermal expansion coefficients in the angle-ply laminates to fit various environmental conditions in engineering application.

Get full access to this article

View all access options for this article.

References

1. Michael, C.Y. Niu . (1992). Composite Airframe Structures. Hong Kong: Conmilit Press Ltd.

2. Zhang, R. , Yeh, H.-L. and Yeh, H.-Y. (1998). A preliminary study of negative poisson’s ratio of laminated fiber reinforced composites. Journal of Reinforced Plastics and Composites, 17(18): 1651-1664.

3. Rogers, K.F. , Phillips, L.N. , Kingston-Lee, D.M. , Yates, B. , Overy, M.J. , Sargent, J.P. and McCalla, B.A. (1977). The thermal expansion of carbon fibre-reinforced plastics. Journal of Material Science, 12: 718-734.

4. Keith Miller, A. (1980). Thermal expansion coefficients for laminates obtained from lnvariant lamina properties. Fiber Science and Technology, 13: 397-409.

5. Takaski, Ishikawa and Tsu-Wei, Chou . (1983). In-plane thermal expansion and thermal bending coefficients of fabric composites. Journal of Composite Materials, 17: 92-104.

6. Yeh, H.-L. and Yeh, H.-Y. (2000). The variation in through-thickness hygrothermal expansion coefficients of laminate composites. Journal of Composite Materials, 34(14): 1200-1215.

7. Yeh, H.-L. and Yeh, H.-Y. (2001). A dimensionless mathematical model for studying the physical parameters of composite laminates-Part II, Accepted for publication in the Journal of Reinforced Plastics and Composites.

8. Ronald F. Gibson . (1994). Principles of Composite Material Mechanics. USA: McGraw-Hill, Inc.

9. Carl T. Herakovich . (1998). Mechanics of Fibrous Composites. USA: John Wiley & Sons, Inc.

10.

10. Robert M. Jones . (1999). Mechanics of Composite Materials, 2nd Edn. USA: Taylor & Francis.

11.

11. Hyer, M.W. (1998). Stress Analysis of Fiber-Reinforced Composite Materials. USA: McGraw-Hill.